The City of Keller's 2.5-MG elevated storage tank is the industry's first-ever joint-use elevated storage tank, a Freese and Nichols-facilitated collaboration between the City of Keller and the Town of Westlake. The composite tank has two concentric-but-isolated tanks to provide independent storage for Keller (1.5 MG) and Westlake (1.0 MG).

The project earned the Engineering Excellence Award from the Texas Council of Engineering Companies and was a finalist for the national Engineering Excellence Award from the American Council of Engineering Companies in 2003.